September Weather in Mana, French Guiana

Last updated: August 23, 2025

In September, the average temperature in Mana, French Guiana hovers around 27°C (81°F). Expect a comfortable range, with minimums of 24°C (76°F) and maximums reaching 30°C (87°F). However, don't forget your umbrella! You might encounter about 52 mm (2.0 in) of precipitation over 14 days. With an average humidity of 62%, it's the perfect time to enjoy the warm climate while staying hydrated!

September Temperature in Mana

In September, in Mana, the average temperature is 27°C (81°F). The maximum can reach 30°C (87°F), while the minimum can be as low as 24°C (76°F). This pleasant climate makes Mana an ideal destination for travelers seeking warm weather and outdoor activities.

September Weather in Mana: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Mana, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mana, September typically has an average temperature of 27°C (81°F), with highs reaching up to 30°C (87°F) and lows dropping to around 24°C (76°F).

Data source: Temperature data for Mana generated using information from the Copernicus Climate Change Service.

September Precipitation in Mana

In Mana in September, the precipitation amount is 52 mm (2.0 in) spread over 14 days.

September Precipitation Trends in Mana

The chart displays monthly precipitation patterns in Mana, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In Mana, September typically receives around 52 mm (2.0 inches) of precipitation spread over approximately 14 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Mana

In Mana in September humidity is 62%. With an average temperature of 27°C (81°F), this humidity feels like walking through a warm, soft blanket, making travel feel both cozy and slightly sluggish as you navigate through the warmth.

September Average Humidity in Mana

This chart illustrates the average monthly humidity levels in Mana, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in Mana is approximately 62%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Mana

In Mana in September, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in Mana.

Maximum UV Index Levels in Mana for September

The chart shows the monthly maximum UV Index (UVI) for Mana in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in Mana typically reaches 13, which falls under the extreme exposure category.

Data source: Mana September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

How September Weather in Mana Compares to Other Months

Weather in Mana varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in Mana, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Mana, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	26°C (79°F)	170 mm (6.7 inches)	70%	extreme
February Weather	26°C (79°F)	125 mm (4.9 inches)	66%	extreme
March Weather	26°C (79°F)	154 mm (6.1 inches)	66%	extreme
April Weather	26°C (80°F)	348 mm (13.7 inches)	66%	extreme
May Weather	26°C (79°F)	417 mm (16.4 inches)	68%	extreme
June Weather	26°C (79°F)	384 mm (15.1 inches)	86%	extreme
July Weather	26°C (80°F)	231 mm (9.1 inches)	76%	extreme
August Weather	27°C (81°F)	86 mm (3.4 inches)	65%	extreme
September Weather	27°C (81°F)	52 mm (2.0 inches)	62%	extreme
October Weather	27°C (82°F)	61 mm (2.4 inches)	63%	extreme
November Weather	27°C (81°F)	172 mm (6.8 inches)	74%	extreme
December Weather	26°C (79°F)	268 mm (10.6 inches)	79%	extreme